Amazon via Monoprice is offering the Monoprice 27″ IPS-Glass Panel Pro LED 2560×1440 monitor for $398 with free shipping. It typically sells for $484 on Amazon and is currently listed at $474 from Monoprice direct. This is the lowest price we have ever seen on this 27″ monitor. It features a beautiful IPS glass panel for optimal viewing angles, ample connectivity options (DisplayPort, VGA, HDMI, and Dual Link DVI-D), and a pair of 2 watt built-in speakers. You’re going to want to use Displayport to push the full resolution, Mac users will need a miniplayport to displayport cable.
If you want a large screen but don’t need as high of a resolution, Buy.com via eBay has a ViewSonic 27″ 1080p full HD widescreen monitor (Model VA2703-LED) for $180 with free shipping. That’s $50 below the next lowest available price and $203 less than retail.